EP 2837437 A1 20150218 - METHOD FOR PRODUCING FLANGELESS CLOSED-CROSS-SECTION-STRUCTURE COMPONENT HAVING CURVED SHAPE
Title (en)
METHOD FOR PRODUCING FLANGELESS CLOSED-CROSS-SECTION-STRUCTURE COMPONENT HAVING CURVED SHAPE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES FLANSCHLOSEN BAUELEMENTS MIT GESCHLOSSENER QUERSCHNITTSTRUKTUR UND GEKRÜMMTER FORM
Title (fr)
PROCÉDÉ DE PRODUCTION DE COMPOSANTS STRUCTURELS À SECTION TRANSVERSALE FERMÉE SANS FLANC POSSÉDANT UNE FORME COURBE
Publication
Application
Priority
JP 2012060644 W 20120413
Abstract (en)
The present invention provides a method and apparatus for manufacturing a closed structure part without flange having a curvature and welded edges along a longitudinal direction of the part and further having a varying cross-sectional shape, from two metal plates. In conventional techniques, it was impossible to simultaneously provide a varying cross-sectional shape and a curvature. In the present invention, it is possible to simultaneously provide a varying cross-sectional shape and a curvature. Each of two metal plates 1a, 1b, which is provided with a curvature along the longitudinal direction of the plate corresponding to the curvature of the part 10 along the longitudinal direction and further provided with both ends in a width direction of the plate corresponding to the welded edges 11 of the part, are press-formed such that a folding line 2 is formed at positions corresponding to a non-welded bent edge 12 in a cross section of the part, and are then stacked on each other vertically such that their bulging sides face outward. Their left ends and right ends in the width direction are mutually welded along the longitudinal direction so as to form welded edges 11. While being guided and conveyed by a pair of left and right rotary rolls 40a and 40b or, in addition thereto, a rotary roll 40c thereunder, the distance between the rotary rolls is changed or, in addition thereto, the rotary roll is moved up and down and the obtained closed structure is made to have a three-dimensional shape by using the folding lines and the welded edges as origins and is thereby formed into a part having the target shape.
IPC 8 full level
B21C 37/15 (2006.01); B21C 37/08 (2006.01); B21C 37/14 (2006.01); B21C 37/16 (2006.01); B21D 5/08 (2006.01); B21D 7/08 (2006.01); B21D 11/08 (2006.01); B21D 11/14 (2006.01); B21D 47/01 (2006.01); B21D 53/88 (2006.01)
CPC (source: CN EP US)
B21C 37/0803 (2013.01 - CN EP US); B21C 37/14 (2013.01 - EP US); B21C 37/155 (2013.01 - CN EP US); B21C 37/16 (2013.01 - EP US); B21D 5/086 (2013.01 - EP US); B21D 22/025 (2013.01 - US); B21D 47/01 (2013.01 - EP US); B23K 31/02 (2013.01 - US); B21D 11/08 (2013.01 - EP US); B21D 11/14 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2837437 A1 20150218; EP 2837437 A4 20151104; EP 2837437 B1 20170412; CN 104364026 A 20150218; CN 104364026 B 20160615; KR 101648286 B1 20160812; KR 20140132764 A 20141118; US 2015076215 A1 20150319; US 9669444 B2 20170606; WO 2013153683 A1 20131017
DOCDB simple family (application)
EP 12874346 A 20120413; CN 201280072365 A 20120413; JP 2012060644 W 20120413; KR 20147028013 A 20120413; US 201214394191 A 20120413